Improvement in pressure-gages and alarms



M. TOULMIN. Pressure 'Gages and Alarms.

N0. 142,969. Patented SeptemPer16,18?3

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MORTON TOULMIN, 0F NEW ORLEANS, LOUISIANA.

IMPROVEMENT IN PRESSURE-GASES ANDVALARMS.

Specification forming part of Letters Patent No. 142,969, dated September 16, 1873 application filed April 15, 1872. v

To all whom it may concern:

Be it known that I, MoRToN TOULMIN, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Pressure-Gage and Alarm, of which the following is a specification:

My invention is an improvement in the construction of pressure-gages and alarms of the class in which a piston working in a vertical steam-pipe has its stem connected with hinged and pendent arms, which are raised somewhat before the steam can escape to sound the alarm.

The invention consists in the construction and novel arrangement, in connection with a vertical steam-pipe, of a tubular piston having a valve-seat at its lower end, and provided with a sliding valve-rod, spring, alarm, and pendent anglearms, all connected with said tubular piston, and an adjustable stop to regulate the point at which the valve on the end of the valve-rod will separate from its seat in the end of the tubular piston.

Figure lis a sectional elevation of my improved pressure gage and alarm, the section being taken on the line :v of Fig. 2; and Fig. 2 is another section taken on the line y y of Fig. l.

Similar letters of reference indicate corresponding parts.

A is the vertical steam-pipe, and B the piston. It works through a stuing-box, C, or packing of any kind, at the top ofthe steampipe, is made hollow and with a valve-seat at the upper end, and is connected above the top of the steam-pipe, by the links l), with the weighted elbowlevers E by their short arms F, the connection being such that when the piston is at the lowest position the said levers E will hang vertically from their pivots, but as it rises they will be raised toward a horizontal line in proportion to the pressure of the steam. A scale or dial of any kind, as indicated in the dotted lines G, will be arranged with the said levers to show the pressure indicated by the levers. H is'the valve to be opened for soundin g the alarm. It is arranged on a long rod, I, extending up through the top of the piston, and provided with a coiled spring, K, so arranged on the end of the piston and with the rod that it keeps the valve closed upon the seat D until the piston rises so far that the top of the rod comes against the beam L, or any other stop, and arrests its upward movement; so that by the continued upward movement of the piston it will be lifted oft from the valve, and allow the steam to escape to the alarm-whistle M, mounted on the piston.

When the steampressure falls the valve will be closed by -the falling of the piston upon it.

The spring is designed to be of merely sufcient strength to sustain the weight of the rod I, and thus prevent escape 0f steam when iiring up, or before the steam-pressurehas become sufficient to sustain the rod.

The stop L is made adjustable on the guide or supporting rods, (shown in Fig. 2,) and is secured at any desired point by a clampscrew; thus, having in view the strength of the boiler, the pressure it is to carry is determined, and the stop L may be set correspondingly.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The combination, with a tubular piston working partly within and partly without a steampipe, and having a valve-seat, D of a valve-rod, I,workin g partly w ithin and partly without said piston, its valve H, the pendent arms E, and alarm M, connected with said tubular piston, the spring K, and the adjustable stop L regulatin g the opening of the valve at the lower end of said tubular piston, substantially as specified.

MORTON TOULMIN.

Witnesses I. l?. MoKrNNoN, F. A. Romains, Jr. 

